Apparatus for treating plastic materials.



R. B. PRICE.

APPARATUS FOR TREATING PLASTIC MATERIALS.

APPLICATION FILED NOV. I2. I915.

2 SHEETS-SHEET I.

IIII IIIIIIIL to "I I1 I -E I g a n N I j WITNESS: I l i INI/E/VTOR .4/"Ha manafifi'z'ce, 5% In y R. B. PRICE.

APPARATUS FOR TREATING PLASTIC MATERIALS.

APPLICATION FILED NOV. I2. 1915.

1,184,016. Patent-ed 23,1916

' 25H SHEET2.

a z 1 I I g N o WS I 4 n H/S A TTORNE Y UNITED sTATEs PATENT OFFICE.

RAYMOND B. PRICE, on NEW YORK, N. Y., ASSIGNOR TO RUBBER REGENERATINGcoMPAuY, A CORPORATION or iNmANA.

APP ARAT US FOR TREATINGBLASTIC MATERIALS.

Specification of Letters Patent.

Patented May 23, 1916.

Application filcd Novembcr 12, 1915. Serial No. 61,038.

' plastic materials during the process of preparation for other uses,such as in the preparation of rubber stock previous to vulcanizing thesame.

The object of my invention is to provide an improved apparatus throughthe use of which the vacuum may be more efficiently and completelyapplied to the material being treated' toremove all of the entrained orentrapped .gases, liquids, etc. This is accomplished in accordance withmy inventionby puncturing or dividing material at a large number ofindependent points and applying a vacuum directly to the material wherethe punctures or divisions are made.

The above object may be accomplished in a variety of ways, but for thepurpose of illustration I have shown in the accompanying drawings twosuch ways of accomplishing the application of vacuum in the mannerreferred to.

For a detailed description of .two forms of my invention, reference maybe had to the "following specification and to the accompanying drawingsforming a part thereof, in which:

Figure 1 is a longitudinal sectional view of an apparatus in which therubber is divided bya series of hollow pins or needles through which thevacuum acts. Fig. 2 is a transverse sectional view thereof. Fig. 3'

is a detail view, partly in section, of one of thehollow pins orneedles. Fig. 4 is a longi- 'tudinal sectional view of a modified formof the device. F 1g. 5 IS a perspective view of a detail of one of theknives or wedges em;

ploy e'd with the form of the device shown in Fig. 4.

Referring to the drawings, the numeral 1 indicates a suitable casingjacketed to provide heating or cooling, if necessary, said casing beingprovided with a hinged cover 2 which is adapted to be retained inposition in any Well krown way, as by the use of;

hinges 3 and bolts 4. The numeral- 5 indi-.

cates a hollow corrugated cylinder'or roll within the casing 1 which iscaused to rotate in any suitable manner, as by the gear 6 attached toone of the journals thereof. The journals of the roll 5 are also hollowand are connected with pipes 7 and 8 through which steam or any otherheating or cooling fluid may be introduced to the space within the roll5. The apparatus thus far described is a well known form of device fortreating plastic material, and is termed a masticator, the rotation ofthe roll causing the plastic material toassume the form of a soft ballor dough-like mass which is kneaded and worked by the roll as itrotates.

On the inner surface of the casing 1 I provide a multiplicity of needlesor .hollow pins 9 which have outwardly extending tubular portions 10projecting from the outside of the casing I so as to be attached to aseries of tubes or pipes 11 for the purpose of producing a vacuum at theends of the needles 9. These pipes 11 are all connected to a commonsource of vacuum, such as by the main supply pipe 12. .The needles 9* 80preferably have the passage therethrough terminating at a point slightlyremoved from the ends, and the orifice thereby formed is located on therear, side of the needles or that side opposite to the side vances.

It will now be seen, as indicated in Fig.

tween the roll and the inner side of the Ca1+; ing will be kneaded andworked and "at the same time the needles 9 will penetrate? the mass andreach all portionsof its interior, the suction acting at the same timeto withdraw all entrapped fiuids, gases, etc.

In Fig. 4 I have shown my invention applied to what is known as a tubingmachine. In this figure the numeral 14 indicates a. suitable cylindricalcasing having a hopper 16 communicating therewith. Located within thecasing 14 is a feed screw or worm 16 driven by a suitable gear or otherdevice 17. Located transversely of the casing 14 within the same are aplurality of series of wedge-shaped bars 18 and 19, one-half of 105 Icute with a large number of small orifices 11;

with which the material contacts as it adexternal pipes 21 which are inturn connected with a suitable source of vacuum or reduced air-pressure.I e

In this form of the device it will be seen that as the plastic materialis 'forced toward the right in Fig. 4, the same will be cut or split upinto numerous small portions and at the same time a "acuum will act onthe material as it passes the, rear end of the wedges. The wedge-shapedbars may be made as numerous as is necessary or convenient, and of anysize that is suitable for the material being treated.

I do not wish to be understood as being limited to the details of formand arrangement, of parts herein set forth, for various changes may bemade by those skilled in the art without departing from the spirit andscope of my invention.

What I claim and desire to protect by Letters Patent is 1. In a devicefor treatingplastic material, means for causing progressive movement ofsaid material, and a series of projecting parts having passagestherethrough copies of this patent may be obtained to: ave cents eaeh,by addressing the Washington, D. G."

- ed to the hollow 2. In a device for treating plasticmaterials, aseries of tapering projections adaptpassages therein, and a source ofreduced air pressure connected with said passages.

. 3. In a device for treating plastic materials, means for causing aprogressive movement of said material, a series of sharp projectionslocated in the path of said material penetrate said materials, andhaving and having passages therethrough, said passages having openingsto the exterior of said projections on the rear side thereof relative tothe movement of said material,

and means connecting said passages with a suitable source of vacuum.

4. In a device for treating vulcani zable plastics, the combination of ahollow member having portion and adapted to penetrate the plastic atsaid opening, and means adapted to effect the penetration ofthe materialby said member and for compressing the material during said penetration.

Signed this 30th day of October, 1915j RAYMOND B. PRICE.

an opening communicating with i Commissioner of- Patents,

